border
单词辨析：
多指靠近两国或两地区分界线的区域。
the German-Polish border
德国与波兰边境
Two years later, he was sent to the border between China and Myanmar.
两年以后，他被派到了中缅边界。
侧重指某区域最外的界线，常和领土有关，也指地图上正式标定的、双方认可的边界或较小行政单位间的界线。
national/state/city boundary
国界/州界/市界
They marked the boundaries of the basketball court.
他们标出了篮球场的边界。
The river forms the boundary between my land and his.
这条河构成了我这块地和他那块地之间的分界线。
指两国接壤的前沿地区，多有军队驻防。
China has a frontier with Vietnam.
中国的边界和越南相接。
Soldiers guard the frontier against invasion.
战士们守卫边疆，防止外敌入侵。
相关例句：
The border between science fact and science fiction gets a bit fuzzy.
科学事实和科幻小说之间的界限变得有点儿模糊了。
Planes parachuted food, clothing, blankets, medicine and water into the rugged mountainous border region
飞机将食品、衣物、毯子、药品和水空投到崎岖多山的边界地区。
The border between China and Korea has been formally delimited.
中国与朝鲜的边界已正式划定了。
Border skirmishes between India and Pakistan were common.
印度和巴基斯坦边境上常常发生小规模战斗。
A special UN commission was formed to demarcate the border.
联合国成立了一个特别委员会来划定边界。
This trail was roughly parallel to the border.
这条小路与边境线大致平行。